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BabcockHall

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Everything posted by BabcockHall

  1. What do you think? Suppose you compare it to acetaminophen. What is different?
  2. I would also consider the interaction between the solvent and the silica (the stationary phase).
  3. It is often helpful to think in terms of nucleophiles and leaving groups.
  4. Can you think of something that might precipate under these conditions?
  5. it is very unusual to make buffers up in anything but aqueous media. I don't know what the solubility of lauric acid is in ethanol, but whatever its pKa in water is, it will have a different pKa i ethanol.
  6. Chemical shifts can be estimated on the basis of which phosphorus-containing functional group is present. The term "predict" may also imply that one provide the multiplicity. Can you show us your work so far?
  7. Do you know which amino acid residues absorb UV light? That would be how I would start my research into this topic.
  8. It is higher than I have measured under similar conditions.
  9. Some filtration units are optimized for speed, as opposed to recovery. Microdialysis might be possible.
  10. DNA can be transferred, and this can be forensically useful.
  11. DNA will also melt, meaning become single stranded, at sufficiently high temperature.
  12. What sources have you consulted and what have you learned about this topic, so far?
  13. Try PubMed if you haven't done so already.
  14. As far as I am aware, what you have written is true. The liver has a central role in both carbohydrate and lipid metabolism. The mitochondrial enzyme HMG-CoA synthase is a key player.
  15. I hesitate to jump in without knowing more. On occasion a sticky mass can be made more tractable through trituration. Perhaps a different purification technique would be more suitable.
  16. Magnesium ions would need two electrons each to become magnesium metal. Wouldn't it be easier just to buy magnesium metal?
  17. There is a difference between a magnesium ion, which is what is present in a magnesium salt, and metallic magnesium. Do you know what it is?
  18. Nelson and Cox, Figure 15-38 also talk about liver glycogen phosphorylase as a sensor of glucose. I suspect that it is only in liver, but I am not certain. Any luck with a PubMed search?
  19. That should read hemiketal, not hemiacetal.
  20. Use the hydroxyl group at carbon-5 to form the hemiacetal. https://commons.wikimedia.org/wiki/File:D-Ribulose_Haworth.svg
  21. There are many minor bases (for example pseudo-uracil), although I doubt that one wold be expected to know their exact number.
  22. That is hydrolysis of a protein into amino acids, and it is a pretty sluggish reaction. Typically it is performed at 110 °C in constant boiling HCl for 24 hours on a protein to effect complete hydrolysis. I would assume that "dilute" hydrochloric means 1 M, but I am not sure.
  23. I don't see why the HCl will destroy the amino acids, but I am doubtful about how appetizing the fish would be after this treatment.
  24. When I see the word stimulate, I would not necessarily associate it with either method of regulation that you outline; in other words, I would in general be open to the possibility that either or both might be occurring. In this specific we would need to identify which protein phosphatase this was, in order to answer the question. I believe that protein phosphatase 2A is the enzyme in this case and that xylulose 5-phosphate plays a role in its regulation. I would also like to mention GL protein, which is known to be able to complex to protein phosphatase-1.
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